The Free Kindle Book of the Day is The Perfect Game by John Hansen. From the synopsis:
In a world where murder is being exploited on TV, viewers watch live assassinations for their own entertainment. A hit game show where the challenge is to kill arises, stirring up remarkable popularity. Millions of viewers all across the globe watch it, vicariously experiencing the thrill of murder without ever committing the crime. And they all love it. Murder is the world’s latest and most remarkable excitement turned entertainment. But what happens when it goes too far?